Why not simply export a PDF from the file menu? Why are you making the printers impositions? Why are you PostScripting the file in a late 1980s sort of way? That is a practice deprecated long, long ago.

exporting does not paginate, I needed to print an 8 page document at FedEx onto 11x17 spreads. The PostScripting issue is a bit of a mystery to me, for whatever reason printing to pdf does not work for me, it just will not save a pdf but it will save a PostScript file.

On the other hand ... the next time you do this, you might want to check out one of the imposition plug-ins for InDesign. I work for Sterling Computing, the maker of IDImposer, so that would be my choice, of course!

Comparing the two alternatives:

The PostScript-Distiller approach:

"I added a new Document Preset for oversize (File >Print Presets >Define... make a new one this size:17.5833 11.5833)

Make sure your bleeds are already set (.125)

File > Print Booklet

Select the Print Preset you just made

click Print Settings...

Select the Print Preset you just made (yes, again)

Printer: PostScript File

PPD: Adobe PDF 9.0

OK

Print

Save the .ps file

Open it with Distiller or Adobe Acrobat Pro

Output to PDF"

Elapsed time: anywhere from 5 minutes to days or even weeks

Chance of errors: moderate

Ease of use: poor

Quality: flattened transparency, loss of managed color

Vintage: late 1980's

vs

The IDImposer approach:

Verify that your Bleeds are set the way you want them, in File > Document Setup... > More Options

Yes, but the feature is quite limited (no Perfect-Bound, etc) ... and if you try to create a Booklet PDF file, you get the error message: "Saving a PDF file when printing is not supported. Instead, choose File > Save."